Hello,
In my test environment, I meet one issue about the pacemaker: when a new node
is added in the cluster, the master node restart. This issue will lead to the
system out of service for a while when adding a new node because there is no
master node. Could you please help tell how to debug such issue?
I have a pacemaker master/slave cluster as below. pgsql-ha is a resource. I
copy the script from /usr/lib/ocf/resource.d/heartbeat/Dumy and add some simple
codes to make it support promote/demote.
Now when I run “pcs cluster stop” on db1,the db1 is stopped status and db2 is
still master.
The problem is: when I run “pcs cluster start” on db1.The db2 status changes as
below: master -> slave->stop->slave->master. Why does db2 restart?
CENTOS7:
======================================================
2 nodes and 7 resources configured
Online: [ db1 db2 ]
Full list of resources:
Clone Set: dlm-clone [dlm]
Started: [ db1 db2 ]
Clone Set: clvmd-clone [clvmd]
Started: [ db1 db2 ]
scsi-stonith-device (stonith:fence_scsi): Started db2
Master/Slave Set: pgsql-ha [pgsqld]
Masters: [ db2 ]
Slaves: [ db1 ]
Daemon Status:
corosync: active/enabled
pacemaker: active/enabled
pcsd: active/enabled
[root@db1 heartbeat]#
==========================================================
/var/log/messages:
Dec 27 00:52:50 db2 cib[3290]: notice: Purged 1 peers with id=1 and/or
uname=db1 from the membership cache
Dec 27 00:52:51 db2 kernel: dlm: closing connection to node 1
Dec 27 00:52:51 db2 corosync[3268]: [TOTEM ] A new membership
(192.168.199.199:372) was formed. Members left: 1
Dec 27 00:52:51 db2 corosync[3268]: [QUORUM] Members[1]: 2
Dec 27 00:52:51 db2 corosync[3268]: [MAIN ] Completed service synchronization,
ready to provide service.
Dec 27 00:52:51 db2 crmd[3295]: notice: Node db1 state is now lost
Dec 27 00:52:51 db2 crmd[3295]: notice: do_shutdown of peer db1 is complete
Dec 27 00:52:51 db2 pacemakerd[3289]: notice: Node db1 state is now lost
Dec 27 00:52:57 db2 Doctor(pgsqld)[6671]: INFO: pgsqld monitor : 8
Dec 27 00:53:12 db2 Doctor(pgsqld)[6681]: INFO: pgsqld monitor : 8
Dec 27 00:53:27 db2 Doctor(pgsqld)[6746]: INFO: pgsqld monitor : 8
Dec 27 00:53:33 db2 corosync[3268]: [TOTEM ] A new membership
(192.168.199.197:376) was formed. Members joined: 1
Dec 27 00:53:33 db2 corosync[3268]: [QUORUM] Members[2]: 1 2
Dec 27 00:53:33 db2 corosync[3268]: [MAIN ] Completed service synchronization,
ready to provide service.
Dec 27 00:53:33 db2 crmd[3295]: notice: Node db1 state is now member
Dec 27 00:53:33 db2 pacemakerd[3289]: notice: Node db1 state is now member
Dec 27 00:53:33 db2 crmd[3295]: notice: do_shutdown of peer db1 is complete
Dec 27 00:53:33 db2 crmd[3295]: notice: State transition S_IDLE ->
S_INTEGRATION
Dec 27 00:53:33 db2 pengine[3294]: notice: Calculated transition 17, saving
inputs in /var/lib/pacemaker/pengine/pe-input-116.bz2
Dec 27 00:53:33 db2 crmd[3295]: notice: Transition 17 (Complete=0, Pending=0,
Fired=0, Skipped=0, Incomplete=0,
Source=/var/lib/pacemaker/pengine/pe-input-116.bz2): Complete
Dec 27 00:53:33 db2 crmd[3295]: notice: State transition S_TRANSITION_ENGINE
-> S_IDLE
Dec 27 00:53:33 db2 stonith-ng[3291]: notice: Node db1 state is now member
Dec 27 00:53:33 db2 attrd[3293]: notice: Node db1 state is now member
Dec 27 00:53:33 db2 cib[3290]: notice: Node db1 state is now member
Dec 27 00:53:34 db2 crmd[3295]: notice: State transition S_IDLE ->
S_INTEGRATION
Dec 27 00:53:37 db2 crmd[3295]: warning: No reason to expect node 2 to be down
Dec 27 00:53:38 db2 pengine[3294]: notice: Unfencing db1: node discovery
Dec 27 00:53:38 db2 pengine[3294]: notice: Start dlm:1#011(db1)
Dec 27 00:53:38 db2 pengine[3294]: notice: Start clvmd:1#011(db1)
Dec 27 00:53:38 db2 pengine[3294]: notice: Restart pgsqld:0#011(Master db2)
/var/log/cluster/corosync.log:
Dec 27 00:53:37 [3290] db2 cib: info: cib_process_request:
Completed cib_modify operation for section status: OK (rc=0,
origin=db2/crmd/99, version=0.60.29)
Dec 27 00:53:37 [3290] db2 cib: info: cib_process_request:
Forwarding cib_delete operation for section //node_state[@uname='db2']/lrm to
all (origin=local/crmd/100)
Dec 27 00:53:37 [3295] db2 crmd: info: do_state_transition: State
transition S_FINALIZE_JOIN -> S_POLICY_ENGINE | input=I_FINALIZED
cause=C_FSA_INTERNAL origin=check_join_state
Dec 27 00:53:37 [3295] db2 crmd: info: abort_transition_graph:
Transition aborted: Peer Cancelled | source=do_te_invoke:161 complete=true
Dec 27 00:53:37 [3293] db2 attrd: info: attrd_client_refresh:
Updating all attributes
Dec 27 00:53:37 [3293] db2 attrd: info: write_attribute: Sent
update 12 with 2 changes for shutdown, id=<n/a>, set=(null)
Dec 27 00:53:37 [3293] db2 attrd: info: write_attribute: Sent
update 13 with 1 changes for last-failure-pgsqld, id=<n/a>, set=(null)
Dec 27 00:53:37 [3293] db2 attrd: info: write_attribute: Sent
update 14 with 2 changes for terminate, id=<n/a>, set=(null)
Dec 27 00:53:37 [3293] db2 attrd: info: write_attribute: Sent
update 15 with 1 changes for fail-count-pgsqld, id=<n/a>, set=(null)
Dec 27 00:53:37 [3290] db2 cib: info: cib_process_request:
Forwarding cib_modify operation for section status to all
(origin=local/crmd/101)
Dec 27 00:53:37 [3290] db2 cib: info: cib_perform_op: Diff:
--- 0.60.29 2
Dec 27 00:53:37 [3290] db2 cib: info: cib_perform_op: Diff:
+++ 0.60.30 (null)
Dec 27 00:53:37 [3290] db2 cib: info: cib_perform_op: --
/cib/status/node_state[@id='2']/lrm[@id='2']
Dec 27 00:53:37 [3290] db2 cib: info: cib_perform_op: +
/cib: @num_updates=30
Dec 27 00:53:37 [3295] db2 crmd: warning: match_down_event: No
reason to expect node 2 to be down
Dec 27 00:53:37 [3295] db2 crmd: info: abort_transition_graph:
Transition aborted by deletion of lrm[@id='2']: Resource state removal |
cib=0.60.30 source=abort_unless_down:343
path=/cib/status/node_state[@id='2']/lrm[@id='2'] complete=true
Dec 27 00:53:37 [3290] db2 cib: info: cib_process_request:
Completed cib_delete operation for section //node_state[@uname='db2']/lrm: OK
(rc=0, origin=db2/crmd/100, version=0.60.30)
Dec 27 00:53:37 [3290] db2 cib: info: cib_perform_op: Diff:
--- 0.60.30 2
Dec 27 00:53:37 [3290] db2 cib: info: cib_perform_op: Diff:
+++ 0.60.31 (null)
Dec 27 00:53:37 [3290] db2 cib: info: cib_perform_op: +
/cib: @num_updates=31
Dec 27 00:53:37 [3290] db2 cib: info: cib_perform_op: +
/cib/status/node_state[@id='2']: @crm-debug-origin=do_lrm_query_internal
Dec 27 00:53:37 [3290] db2 cib: info: cib_perform_op: ++
/cib/status/node_state[@id='2']: <lrm id="2"/>
I use this command to create the resource:
pcs resource create pgsqld ocf:heartbeat:Doctor op start timeout=60s op stop
timeout=60s op promote timeout=30s op demote timeout=120s op monitor
interval=15s timeout=10s role="Master" op monitor interval=16s timeout=10s
role="Slave" op notify timeout=60s; pcs resource master pgsql-ha pgsqld
notify=true;pcs constraint order start clvmd-clone then pgsql-ha;
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